#pragma once

#include <iostream>
#include <string>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "Log.hpp"

using namespace LogModule;

const int defaultfd = -1;

class UdpServer
{
public:
    UdpServer(uint16_t port)
        : _sockfd(defaultfd),
          _port(port),
          _is_running(false)
    {
    }

    void Init()
    {
        // 1、创建套接字
        _sockfd = socket(AF_INET, SOCK_DGRAM, 0);
        if (_sockfd < 0)
        {
            LOG(LogLevel::FATAL) << "socket error!";
            exit(1);
        }
        LOG(LogLevel::INFO) << "socket success, sockfd: " << _sockfd;

        // 2、绑定socket信息，ip和端口
        // 2.1、填充sockaddr_in结构体
        struct sockaddr_in local;
        bzero(&local, sizeof(local));
        local.sin_family = AF_INET;
        local.sin_port = htons(_port);

        //local.sin_addr.s_addr = inet_addr(_ip.c_str());
        local.sin_addr.s_addr = INADDR_ANY;

        int n = bind(_sockfd, (struct sockaddr *)&local, sizeof(local));
        if (n < 0)
        {
            LOG(LogLevel::FATAL) << "bind error";
            exit(2);
        }
        LOG(LogLevel::INFO) << "bind success, sockfd: " << _sockfd;
    }

    void Start()
    {
        _is_running = true;

        while (_is_running)
        {
            // 1. 收消息
            char buffer[1024];
            struct sockaddr_in peer;
            socklen_t len = sizeof(peer);
            ssize_t s = recvfrom(_sockfd, buffer, sizeof(buffer) - 1, 0, (struct sockaddr*)&peer, &len);
            if(s > 0)
            {
                int peer_port = ntohs(peer.sin_port);
                std::string peer_ip = inet_ntoa(peer.sin_addr);
                buffer[s] = 0;
                LOG(LogLevel::DEBUG) << "[" << peer_ip << ":" << peer_port << "]#" << buffer;
                std::cout << "read message : " << buffer << std::endl;
                // 2. 发消息
                std::string echo_string = "server say@ ";
                echo_string += buffer;
                ssize_t n = sendto(_sockfd, echo_string.c_str(), echo_string.size(), 0, (struct sockaddr*)&peer, len);
            }


        }
    }

    ~UdpServer()
    {
    }

private:
    int _sockfd;
    uint16_t _port;
    //std::string _ip;
    bool _is_running;
};